<template>
    <div class="goodsinfo-container">
        <transition
        @before-enter="beforeEnter"
        @enter="enter"
        @after-enter="afterEnter"
        >
            <div class="ball" v-show='ballFlag'></div>
        </transition>
        
        <!-- 商品轮播图区域 -->
        <div class="mui-card">
			<div class="mui-card-content">
				<div class="mui-card-content-inner">
					<swiper :lunbotuList="lunbotuList" :isfull="false"></swiper>
				</div>
			</div>
		</div>
        <!-- 商品购买区域 -->
         <div class="mui-card">
				<div class="mui-card-header">{{goodsinfo.title}}</div>
				<div class="mui-card-content">
					<div class="mui-card-content-inner">
						<p class="price">
                            市场价：<del>￥{{goodsinfo.market_price}}</del>&nbsp;&nbsp;销售价：<span class="now_price">￥{{goodsinfo.sell_price}}</span>
                        </p>
                        <p>购买数量：<numbox :@getcount='getSelectedCount' :max="goodsinfo.stock_quantity"></numbox></p>
                        <p>
                            <mt-button type="primary" size="small">立即购买</mt-button>
                            <mt-button type="danger" size="small" @click="addToShopCar">加入购物车</mt-button>
                            <!-- 按钮属于goodsinfo，数字属于numberbox，属于父子组件嵌套，无法直接回获取， -->
                            <!-- 子组件向父组件传值 -->
                        </p>
					</div>
				</div>
			</div>
        <!-- 商品参数区域 -->
        <div class="mui-card">
				<div class="mui-card-header">商品参数</div>
				<div class="mui-card-content">
					<div class="mui-card-content-inner">
                        <p>商品货号：{{goodsinfo.goods_no}}</p>
                        <p>库存情况：{{goodsinfo.stock_quantity}}件</p>
                        <p>上架时间：{{goodsinfo.add_time | dateFormat}}</p>
					</div>
				</div>
				<div class="mui-card-footer">
                    <mt-button type="primary" size="large" plain @click="goDesc(id)">图文介绍</mt-button>
                    <mt-button type="danger" size="large" plain @click="goComment(id)">商品评论</mt-button>
                </div>
			</div>
        <h3>商品详情页面</h3>
    </div>
</template>
<script>
import swiper from '../subcomponents/swiper.vue';
import numbox from '../subcomponents/goodsinfo_numbox.vue';
export default {
    data(){
        return {
            id:this.$route.params.id,//路由参数id
            lunbotu:[],//录播图
            goodsinfo:[],//获取商品信息
            ballFlag:false,//控制小球隐藏和显示标识符
            selectedCount:1,//保存用户选中的商品数量
        }
    },
    created(){
        this.getLunbotu();
        this.getGoodsInfo();
    },
    methods:{
        getLunbotu(){
            this.$http.get('api/getthumimages/'+this.id).then(result => {
                if(result.body.status === 0){
                    //先循环轮播图的每一项,轮播图只认识item.img,不认识item.src
                    result.body.message.forEach(item => {
                        item.img=item.src;
                    })
                    this.lunbotu=result.body.message;
                }
            })
        },
        getGoodsInfo(){
            this.$http.get('api/goods/getinfo/'+this.id).then(result => {
                if(result.body.status === 0){
                    this.goodsinfo=result.body.message[0];
                }
            })
        },
        //点击使用编程式跳到图文介绍页面
        goDesc(id){
            this.$router.push({name:'/home/goodsdesc',params:{id}});
        },
        goComment(id){
             this.$router.push({name:'/home/goodscomment',params:{id}});
        },
        addToShopCar(){
            this.ballFlag=!this.ballFlag;
        },
        beforeEnter(el){
            el.style.transform="trsnslate(0,0)";
        },
        enter(el,done){
            el.offsetWidth;
            //小球动画优化思路，最终位移到的位置写死，分辨率不同也会有不一样的位置
            // 获取小球在页面中的位置
            const ballPosition=this.$refs.ball.getBoundingClientRect();
            // 获取微标在页面的位置
            const badgePosition=this.document.getElementById('badge').getBoundingClientRect();
            const xDist=badgePosition.left-ballPosition.left;
            const yDist=badgePosition.top-ballPosition.top;
            el.style.transform="trsnslate($(xDist)px,$(yDist)px)";
            // el.style.transform="trsnslate(93px,230px)";
            el.style.transition='all 0.5s cubjc-bezier(,4,-0.3,1,.68)';
            done()
        },
        afterEnter(el){
            this.ballFlag=!this.ballFlag;
        },
        getSelectedCount(count){
            this.selectedCount=count;
            console.log('拿到的数量值为：'+this.selectedCount);
        },
    },
    components:{
        swiper,
        numbox
    }
}
</script>
<style scoped lang="scss">
.goodsinfo-container {
    background-color: #eee;
    overflow: hidden;
    .now_price {
        color: red;
        font-size: 16px;
        font-weight: bold;
    }
    .mui-card-footer{
        display: block;
        button {
            margin: 12px 0;
        }
    }
    .ball {
        widows: 15px;
        height: 15px;
        border-radius: 50%;
        background-color: red;
        position: absoulte;
        z-index: 99;
        top: 390px;
        left: 146px;
    }
}
</style>